Stamp-mill attachment



No. 748,820. PATENTED JAN. 5, 1904.

' I I L. R. TULLOOH.

STAMP MILL ATTACHMENT.

APPLICATION FILED FEB. 24 1903. H0 HODEL. 2 SHEETS-SHEET 1.

Fig. 1. Pk 2. 4 m

' 5 C i 16 i8 14V 12 WJTNESSLS: 3 y lgw vrok.

/- 01M 4, AJJM 7 741x124 M WA: 6% Z 17 Arrow/25 UN ITED STATES retested jafiuairy 5, 1904.

W P TE T OFFICE.

- STAM P-IMYIILL, ATTACH M ENT.

SP-IEGIFIOATIONformihg part of Letters Patent 110,748,820, dated January 5, 1904.

" Application filed February 24, 1903. vfierial No. 144,709. (No model.)

To all whom it may concern.- 1

Be it known that I, LOUIS R. TULLooH, a citizen of the United States, residing at Angels Camp, in the county of Galaveras and State of California, have invented certain new and useful Improvements in Stamp MillAttachments, of which thefollowing is a specification.

My invention relates to an apparatus for The object of my present invention is to provide an apparatus by means of which these operations may be performed with ease and rapidity and with perfect safety, which shall be cheap and simple in construction, and which can be readily applied to stamp-mills at present in use. 1

My invention therefore resides in the novel construction, combination, and arrangement of parts for the above ends hereinafter fully specified, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a front view of a portion of a stampmill equipped with my improvements. an enlarged vertical section of the same, certain parts being broken away. Fig. 3 is a cross-section of Fig. 2 taken through the finger sliding through the vertical slot. Figs,

4, 5, and 6 are enlarged front views in different positions of the shifting apparatus proper. Figs. 7, 8, and 9 are corresponding cross-sections of the same. of the pedestalthrough the slide.

Referring to the drawings, 1 represents the posts of the mill, 2thecaui-sha'ft, 3 the stem, 4 the tappet, and 5 the cam, all constructed and arranged in the usual manner.

The present practice is to provide a stamp finger or support which rocks forward underneath the tappet when it is desired to hang up the stamp. This finger rocks upon a bar which extends between the posts 1. 'I make Fig. 2 is- Fig. 10 is a cross'seetion Said support com- A spring 9, secured to said "bar and also to said pedestal, normally maintains said pedestal in a position inclined slightly inward to- Ward the stamp-stem. Within said pedestal slides substantially vertically a prop-stem 10, carrying at its upper end'a prop 11. The

lower end of said stem when the stem is in its lowermost position, passes through a hole 12 in a horizontal slide 13, said slide sliding in a bearing transverse to the frame of the mill. To impart said movement to said slide, it is connected, by means of a pin or stud 14, withv a lever 15, said stud 14 working in a slot 16, formed in the front side of the pedestal, and the lever 15 rocking against said front side. The lever is substantially vertical, its lower arm extending downward to a point Where it can be readily operated by hand and being limited in its movement by two stops 17 and 18. The upper end of the lever is forked widely, as shown at 19, and to the ends of said forkis attachedachain 20. Said fork is made of spring metal, so as to hold said chain taut.

bent rearwardly to form a crank 28, which carries an upwardly-extending stud 29,engaging one of a series of holes 30 in a curved pitman 31, the rear end of which is'secu red to the rear end of a curved lifter-arm 32, which is bent around the rounded surface of the prop and has a central longitudinal slot 33, which moves on stops 34 35, extending outward from said prop. The'freeend of said curved arm is formed into a head 36,which is adapted to be interposed between the cam and the under surface of the tappet, enabling said cam to lift said tappet. A spring 37,secured upon the prop below the lifter-arm, holds the latter up until depressed by the tappet. To prevent the prop from rotating, it is provided with a rear extension or finger 38,sliding in a vertical slot 39 in the pedestal.

The operation of the apparatus is as follows: When the parts are in the position, shown in Fig. 1, the cam is operating, the

stamp is dropping, and the prop-stem is at its lowest position, its lower end passing through the hole in the slide 13. The operator now moves the handle of the lever 15 to the right, and as the stud 14 of the leveris fixed on account of the slide being stationary by the prop-stem passing therethrough the upper end of the lever is moved to the left, causing the chain to rotate from right to left and causing the wheel 21 to rotate in a corresponding direction, so that the crank-arm 28 also rotates from right to left. This causes the lifter-arm 32 to move to the left, which brings its head into the path of the cam, causing said cam to raise said head, thereby also raising the tappet,and also to raise the stem out of the hole in the slide. This permits the slide to advance still farther, the pressure on the lever 13 being maintained, causing the chain to move still farther to the left and the sprocket-pinion to rotate to a correspondin g extent, carrying with it the crankarm, which has now made almost a complete revolution. The crank-arm moving to the rear in the latter part of its movement correspondingly moves the pitman 31,which moves the head 36 also to the rear out of engagement with the cam. The prop-stem, however, now rests upon the slide, and the tappet rests upon the prop, so that the tappet is hung up out of engagement with the cam. When the operator wishes to start the stamp dropping, he reverses the movement of the handle, moving the lower end of it to the left, the efiect of which through the crank-arm is to move the head of the bent arm into a position to be interposed between the cam and tappet to relieve the prop of the weight of the stamp and also moving the slide to the right, so that the bottomof the stamp-stem then drops into the hole 12 in said slide. The continued movement of the lever moves the crank-arm to the rear, withdrawing the head from below the tappet. The parts are now in the position in which they were at the commencement of the operation.

I do not limit myself to the exact construction here shown, as the arrangement and construction of the parts may be varied without departing from the spirit of my invention to suit the convenience of the operator. Thus, for instance, the operating-lever may be arranged to swing backward and forward instead of transversely across the device.

I claim- 1. In a device of the character described, the combination, with the cam and tappet, of a movable element arranged to be interposed between the cam and tappet to lift the latter by means of the former, a vertical shaft having a crank-arm pivotally connected with said element, a prop and stem therefor rising and falling with said element, a suitable bearing for said stem, a vertical lever, means operated by said lever for rotating said shaft to interpose said element to raise the tappet, and a slide pivoted to the lever, whereby the further continued movement of the lever moves the slide beneath said stem to support the prop and tappet thereon, substantially as described.

2. In a device of the character described, the combination, with the cam and tappet, of a prop for supporting the tappet and having a stem, said stem being suitably guided substantially vertically, a curved arm swinging around said prop and arranged to be interposed between the cam and tappet to raise the latter by means of the former, a shaft having a crank-arm connected by a link with said curved arm, a horizontal slide arranged in one position to support the stem and in another position to permit the stem to drop to a lower level, a lever pivoted to the slide, operatively connected at its upper end with the shaftso that the vibration of the lever rotates said shaft, and a fulcrum for the lever below said slide, whereby when said slide is held stationary by engagement with the end of the prop-stem the lever when operated rocks about its pivot on the slide and when the prop-stem has been lifted, the lever when operated rocks about said fulcrum to shift said slide, substantially as described.

3. In a device of the character described, the combination with vthe cam and tappet, of the prop and prop-stem, the swinging arm movable around said prop and having a part arranged to be interposed between the cam and tappet, the shaft operatively connected with said arm to rock the same, the vertical lever operatively connected at itsupper end with said shaft to rotate the same, the slide for supporting the prop-stem to which said lever is pivoted and means for limiting the movement of the lower end of the lever to form a second fulcrum therefor, substantially as described.

4. In a device of the character described,

the combination with the cam and tappet, of

the prop for the tappet, the movable element carried by said prop and arranged to be interposed between said cam and tappet to raise the latter by means of the former, the vertically-movable stem for the prop,the slide for supporting said stem, the lever connected to said slide, and operatively connected at one end with said movableelement whereby the vibration of the lever interposes said element between the cam and tappet and a second f ulcrum for the lever whereby the further vibration thereof shifts said slide when the latter is permitted to move by the rising of the stem, substantially as described.

5. In a device of the character described, the combination with the cam and tappet of a prop for the latter, a prop-stem, a movable element arranged to be interposed between the cam and tappet to lift the latter by means of the former, a pedestal in which said propstem slides, said pedestal being movably supported upon the frame of the mill, a spring for holding said pedestal in an upright position, a slide forming a support for the prop- 10 connected with said curved arm, a vertical lever for rocking said shaft, a slide forming a support for the prop-stem to which said Isver is pivoted, and a fulcrum for said lever independent of its pivot, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two subscribing wit- DGSSGS.

LOUIS R. TULLOOH.

' Witnesses:

FRANCIS M. WRIGHT, GEORGE S. EASTMAN. 

